UNIT 1 Flashcards
What is a healthy diet?
A healthy diet is a diet that maintains or improves overall health. A healthy diet provides the body with essential nutrition: fluid, macronutrients such as protein, micronutrients such as vitamins, and adequate fiber and food energy.
What are the three types of nutrients
Carbohydrates
Fats/Lipids
proteins
Tom is a 16-year-old who is 175cm tall with a mass of 75kg. Estimate his BMR
BMR = [66+(13.7 x 75kg) + (5.0 x 175) - (6.8 x 16)] x 4.18
= 7773.546
What are the four stages of digestion
Ingestion - Taking in or eatiing food
digestion - The breakdown of food by mechanical and chemical processes into molecules small enough for us to absorb
absorption - The transpost of the products of digestive from the digestive system into the circulatory system which distributes them to the reat of the body
elimination- the removal of undigested soild waste poop or pee
What is the pasages way of food
enters the oral cavity with mechanical and chemical reaction.
Pharnyx squeezes bolus of food into the esophagues
Transposts into the stomach
Stomach secretion of gastric juices. Mucus protects the stomach from acid pepsin. Food gets breaked up in smaller by contrations.
Small intestine three segmenst duodenum, jejunum and ileum which break down food using enzymes released by the pancrease and bile from the liver
Large Intestine- 90% of absortion happens here
Anus eliminates feces.
What is the enyme found in saliva beigins the chemical digestion of starches
Amylase
Where is bile stored before it enters the alimentary canal
The gallbladder
where does the process of chemical digestion being
Mouth
What does mechanical digestion in the stomach invilve
?
Water is absorbed from undigested material in the body primarily by the
Large intestine
What “food tube” carries food between the pharynx and the stomach
Esophagus
The stomach breaks down food into an acidic liquid called
Chyme
what are the two elements of blood
Fluid Portion - called plasma that consists of water-dissolved gasses, protein, sugars, vitamins, minerals and waste.
Solid Portion- Call the form portion that consists of red blood cells white bood cells and platelets that are formwed in boone marrow
What is Plasma
Is 92% water dissolves and transports other substances
7% plasma proteins maintain fluid balance. helps with blood clotting
1% glucose fatty acids vitamins salts and gases maintain fluid balance and aassists in nerve/muscle function
what are red blood cells
(erythrocytes) make up 44% of the total volume of blood and are specialized for oxygen transport due to the hemoglobin they contain. Can also carry carbon dioxide in small amounts to aid in waste removal.